2900 square degree search for the optical counterpart of short gamma-ray burst GRB 180523B with the Zwicky Transient Facility. (arXiv:1901.11385v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Coughlin_M/0/1/0/all/0/1">Michael W. Coughlin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ahumada_T/0/1/0/all/0/1">Tomas Ahumada</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cenko_S/0/1/0/all/0/1">S. Bradley Cenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cunningham_V/0/1/0/all/0/1">Virginia Cunningham</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ghosh_S/0/1/0/all/0/1">Shaon Ghosh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Singer_L/0/1/0/all/0/1">Leo P. Singer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bellm_E/0/1/0/all/0/1">Eric C. Bellm</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Burns_E/0/1/0/all/0/1">Eric Burns</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+De_K/0/1/0/all/0/1">Kishalay De</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Goldstein_A/0/1/0/all/0/1">Adam Goldstein</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Golkhou_V/0/1/0/all/0/1">V. Zach Golkhou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kaplan_D/0/1/0/all/0/1">David L. Kaplan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kasliwal_M/0/1/0/all/0/1">Mansi M. Kasliwal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Perley_D/0/1/0/all/0/1">Daniel A. Perley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sollerman_J/0/1/0/all/0/1">Jesper Sollerman</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bagdasaryan_A/0/1/0/all/0/1">Ashot Bagdasaryan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dekany_R/0/1/0/all/0/1">Richard G. Dekany</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Duev_D/0/1/0/all/0/1">Dmitry A. Duev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Feeney_M/0/1/0/all/0/1">Michael Feeney</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Graham_M/0/1/0/all/0/1">Matthew J. Graham</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hale_D/0/1/0/all/0/1">David Hale</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kulkarni_S/0/1/0/all/0/1">Shri R. Kulkarni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kupfer_T/0/1/0/all/0/1">Thomas Kupfer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Laher_R/0/1/0/all/0/1">Russ R. Laher</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mahabal_A/0/1/0/all/0/1">Ashish Mahabal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Masci_F/0/1/0/all/0/1">Frank J. Masci</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Miller_A/0/1/0/all/0/1">Adam A. Miller</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Neill_J/0/1/0/all/0/1">James D. Neill</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Patterson_M/0/1/0/all/0/1">Maria T Patterson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Riddle_R/0/1/0/all/0/1">Reed Riddle</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rusholme_B/0/1/0/all/0/1">Ben Rusholme</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Smith_R/0/1/0/all/0/1">Roger Smith</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tachibana_Y/0/1/0/all/0/1">Yutaro Tachibana</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walters_R/0/1/0/all/0/1">Richard Walters</a>

There is significant interest in the models for production of short gamma-ray
bursts. Until now, the number of known short gamma-ray bursts with
multi-wavelength afterglows has been small. While the {it Fermi} Gamma-Ray
Burst Monitor detects many gamma-ray bursts relative to the Neil Gehrels {it
Swift} Observatory, the large localization regions makes the search for
counterparts difficult. With the Zwicky Transient Facility recently achieving
first light, it is now fruitful to use its combination of depth ($m_textrm{AB}
sim 20.6$), field of view ($approx$ 47 square degrees), and survey cadence
(every $sim 3$ days) to perform Target of Opportunity observations. We
demonstrate this capability on GRB 180523B, which was recently announced by the
{it Fermi} Gamma-Ray Burst Monitor as a short gamma-ray burst. ZTF imaged
$approx$ 2900,square degrees of the localization region, resulting in the
coverage of 61.6,% of the enclosed probability over 2 nights to a depth of
$m_textrm{AB} sim 20.5$. We characterized 14 previously unidentified
transients, and none were found to be consistent with a short gamma-ray burst
counterpart. This search with the Zwicky Transient Facility shows it is an
efficient camera for searching for coarsely-localized short gamma-ray burst and
gravitational-wave counterparts, allowing for a sensitive search with minimal
interruption to its nominal cadence.

There is significant interest in the models for production of short gamma-ray
bursts. Until now, the number of known short gamma-ray bursts with
multi-wavelength afterglows has been small. While the {it Fermi} Gamma-Ray
Burst Monitor detects many gamma-ray bursts relative to the Neil Gehrels {it
Swift} Observatory, the large localization regions makes the search for
counterparts difficult. With the Zwicky Transient Facility recently achieving
first light, it is now fruitful to use its combination of depth ($m_textrm{AB}
sim 20.6$), field of view ($approx$ 47 square degrees), and survey cadence
(every $sim 3$ days) to perform Target of Opportunity observations. We
demonstrate this capability on GRB 180523B, which was recently announced by the
{it Fermi} Gamma-Ray Burst Monitor as a short gamma-ray burst. ZTF imaged
$approx$ 2900,square degrees of the localization region, resulting in the
coverage of 61.6,% of the enclosed probability over 2 nights to a depth of
$m_textrm{AB} sim 20.5$. We characterized 14 previously unidentified
transients, and none were found to be consistent with a short gamma-ray burst
counterpart. This search with the Zwicky Transient Facility shows it is an
efficient camera for searching for coarsely-localized short gamma-ray burst and
gravitational-wave counterparts, allowing for a sensitive search with minimal
interruption to its nominal cadence.

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